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(11) | EP 0 383 307 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Image reading apparatus |
(57) An image reading apparatus comprises a multiline sensor on which a plurality of linear
sensor arrays are arranged on a single substrate, a focusing optical system for focusing
an object image on the multiline sensor and a blazed diffraction grating, disposed
in an optical path between the focusing optical system and the multiline sensor, for
color-separating light from the object into a plurality of light components and guiding
the color-separated light components to the corresponding sensor arrays. The grating
thickness of the blazed diffraction grating is changed in correspondence with an angle
of light incident on the blazed diffraction grating. |